EXPLORER

4,8

(78 commentaires)

Iosif P.

@iosifpeterfi

4,8

7,0

94%

Systems Architect, Software Engineer, Developer

$64 USD / Heure

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Germany (6:16 PM)

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Inscrit depuis le novembre 14, 2006

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3 Recommandations

$64 USD / Heure

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Senior Systems & Security Engineer with 15+ years in enterprise-grade IT. I design, harden, and operate high-availability infrastructure, and I streamline delivery with automation and clean processes. My focus: reliability, security, and clear documentation—so changes are low-risk and handovers are effortless. Strengths: Infrastructure architecture & operations (Linux/Windows, virtualization, networking) Security hardening, identity & access, monitoring/observability Automation & DevOps practices (CI/CD, config management, IaC) Migrations and upgrades with minimal downtime Concise runbooks, risk-aware planning, and stakeholder-friendly communication Certifications: CompTIA Security+, Microsoft MCSE/MCSA/MCITP Languages: English (C2), German (C1), native Romanian Location: Germany • NDA-friendly • Reliable and responsive

Vérifications

Dans les temps

91 %

Dans le budget

99 %

Taux d'acceptation

84 %

Taux de réembauche

29 %

Voir tous les Linux Developers en Germany

Portfolio

SchnellNode EU hosting: site + ops

Role: Senior Systems Engineer
Summary: Planned and operated a highly available Cisco/VMware/Windows stack: UCS/Nexus/ASA, ESXi, AD/Exchange/SCCM, NetApp, Veeam, VDI (VMware Horizon). Implemented patching, backup, and access controls for mission-critical services.
Outcomes: Reduced downtime during maintenance windows; faster VDI login and app delivery; hardened perimeter and email security; documented SOPs for audits.
Tech: Cisco UCS/Nexus/ASA, ESXi, AD/Exchange/SCCM, NetApp, Veeam/BackupExec, Horizon VDI, PowerShell.
Skills/Tags: Enterprise Windows, Networking, Virtualization, Backups/DR, Compliance.
Visuals: High-level network diagram (redacted), VDI/service dashboards

Datacenter Modernization

Role: Product & Delivery Lead / CEO
Summary: Owned roadmap and execution for a privacy-first, blockchain-integrated cloud. Prioritized features from user research, aligned stakeholders, and guided engineering on secure architecture and go-to-market.
Outcomes: Shipped core platform milestones on time; defined KPIs; reduced delivery risk via staged releases and clear acceptance criteria; investor/customer communications.
Tech: Product tooling, backlog systems, go-to-market assets; oversight of infra and chain components.
Skills/Tags: Product Strategy, Stakeholder Mgmt, Risk, Roadmapping, Security-by-Design.
Visuals: Product timeline, feature overview, KPI snapshot (sanitized).

Ethernity CLOUD - DeCC

Role: Blockchain Infrastructure Engineer
Summary: Operated production validators and public RPC endpoints for the bloxberg research network. Implemented monitoring, secure key management, network policies, and upgrade playbooks; maintained block explorer and faucet services.
Outcomes: Stable consensus participation; improved node sync times; zero key exposure incidents; documented blue/green upgrade workflow.
Tech: Linux, systemd, reverse proxies, monitoring/alerting, snapshot/backup tooling.
Skills/Tags: Blockchain Ops, Node Security, Observability, SRE Practices, Upgrade Automation.
Visuals: Explorer dashboard (redacted), validator metrics (sanitized).

bloxberg — Research Blockchain

Role: Systems Architect / Science Systems Administrator
Summary: Designed, operated, and evolved a clustered VMware/Windows/Linux environment supporting research services (AD/PKI, SQL, collaboration, MDM). Ran MPDL’s blockchain infrastructure (validators, RPC, explorer, faucet) with hardened security and documented procedures.
Outcomes: ≥99.9% service uptime; patching and backup SLAs formalized; faster incident resolution (minutes vs. hours); reproducible chain upgrades with rollback plans.
Tech: VMware ESXi/vCenter, Windows Server/AD CS, Linux, SQL Server, Workspace ONE, Seafile, Bash/PowerShell, CI scripts.

Max Planck Digital Library (MPDL

SchnellNode EU hosting: site + ops

Datacenter Modernization

Ethernity CLOUD - DeCC

bloxberg — Research Blockchain

Max Planck Digital Library (MPDL

4.8 · 78 Avis

Commentaires

Android Secure Storage Migration • $2 500 USD

Iosif fully understood the urgency as well as the scope of the task. His experience is IT Security and specifically the Android platform was critical to solving this issue. He worked closely with our team (over the weekend) to deliver the solution.

Java

Linux

Mobile App Development

Android

Flutter

+5 plus

Vishal M.

@ishim9

•

Panjim, India

•

il y a 7 jours

Meta Data Capture Apify Actors • $575 USD

We had an excellent experience. Very professional.

Web Scraping

Software Architecture

Data Extraction

API Development

Data Management

Faith E.

@adellec1

•

ST. GEORGE, Grenada

•

il y a 11 jours

Low-Latency RAW-HID → Virtual XInput Bridge • $1 950 USD

He delivered exactly what i was looking, even exceeded expectations when many others could not do what i was asking! He works very fast! If I have any more work that fits his expertise, will 100% go with him!

+1 plus

Jarrod B.

@jarrodb4

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Ofallon, United States

•

il y a 15 jours

Comprehensive Anki (WINDOWS) Add-on Consulting • $200 USD

He is definitely very professional and was very pleasant to work with: professional, short and to the point! - I hope and would be happy to hire him again!

C Programming

Python

Software Architecture

Objective C

C++ Programming

+3 plus

Avraham L.

@a0504115649m

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Modiin Ilit, Israel

•

il y a 16 jours

SMAX, SiteScope UCMDB Systems Restoration • $2 400 USD

A very dedicated freelancer who consistently demonstrated professionalism and commitment. The project was delivered on time, with high‑quality reports that explained in depth the work completed. Communication was clear, and the documentation made it easy to understand the process and results. Highly recommended.

JavaScript

Linux

Troubleshooting

Software Architecture

Active Directory

+5 plus

Oscar P.

@oscarpeter

•